Sometimes spelled Cluni or Clugny. Celebrated Benedictinemonastery, founded in 909 by William, Duke of Aquitaine, in Cluny, Saone-et-Loire, France, which became the mother-house of a vast group of monasteries forming the Congregation of Cluny. It played an important part in the Church reform of the 11th century, and reached the zenith of its glory in the 12th century, when it is said the congregation had 2,000 monasteries. Its leaders and students constitute a list remarkable men; those profiled on this site include